Quarter second time mechanism



(Modem 4 Sheets-Sheet 1.

J. KARE. H QUARTER SECOND TIME MECHANISM. V v No. 273,100. Patented Feb.27, 1883.

model.) 4 Sheets-Sheet 2.

J; KARR.

- QUARTER SECOND TIME MECHANISM.

No. 273,100. Patented Feb.27, 1883.

(Model) 4 Sheets-Sheet 3.

J. KARR.

QUARTER SECOND TIME MECHANISM. I No. 273,100. Patented Feb.27, 1883.

(ModeL) 4Sheets-Sheet 4.

J. KARR.

QUARTER SECOND TIME MECHANISM. No. 273,100. Patented Peb.27, 1883..

UNITED STATES PATENT OFFICE.

JACOB KARE, OF WASHINGTON, DISTRICT OF COLUMBIA.

QUARTER-SECOND TIME MECHANiSM.

SPECIFICATION forming part of Letters Patent No. 273,100, dated February 2'7, 1883.

Application filed November 9, 1882. (Model) To all whom it may concern:

Be it known that I, JACOB KARE, ofWashington, in the District of Columbia, have .invented certain new and useful Improvements in Time Mechanisms; and I dohereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which Figure 1 is a front elevation of my improved time-piece. Fig..2 is a like view of the train separated from its casing. Fig. 3 is a perspective View of the balance-wheel, escapement, quarter-seconds pinion, and stop mechanism separated from the train. Fig. 4: is a like view of the front end of the center arbor and its connections separated from each other. Fig. 5 is a central longitudinal section of the same as combined. Fig. 6 is a plan View of the stop mechanism. Figs. 7 and 8 are side elevations of the same, showing respectively the balance-wheel locked and free; and Fig. 9 is a plan view of the upper end of the timetrain.

Letters of like name and kind refer to like parts in each of the figures.

My invention has for its object the production of a simple, inexpensive, and elficient timer; and it consists principally in a time mechanism provided with a sweep secondshand and a quarter-seconds hand, which are operated by one train and move simultaneously, substantially as and for the purpose hereinafter specified.

It consists, further, in a time mechanism in which a quarter-seconds hand is attached to a separate arbor that receives motion directly from the escape-wheel arbor, substantially as and for the purpose hereinafter shown.

It consists, further, in the means employed for causing the quarter-seconds hand to stop at the desired points, substantially as and for the purpose hereinafter set forth.

It consists, further,in a time mechanism having a single time-train, and provided with an independent sweep seconds-hand and an independent minutes-hand, each of which may, by the operation of one mechanism, be simultaneously set at zero, substantially as and for the purpose hereinafter shown and described.

It consists, further, in a time mechanism having combined with its balance-wheel a stop-arm which is adapted to impinge suddenly upon and to arrest motion of the same, and to move with and start said balance-wheel when it is desired to set the train in motion, substantially as and for the purpose hereinafter specified.

It consists, finally, in a time mechanism provided at the center of its dial with the usual minutes and hours hands, and with an independent sweep seconds-hand, and having at one side of said center an independent minlites-hand, and at the opposite side of said center a quarter-seconds hand, substantially as andfor purpose hereinafter shown.

In the annexed drawings, A represents the front plate,and B the back plate, of my movement, which are connected together at their corners and heldin relative parallel positions by means of posts G in the usual manner.

Journaled at one side of the frame is the first arbor, D, which is provided with a spring, (I, and wheel (1, and the latter connected with said arbor by means of a ratchet-wheel and pawl in the usual manner. Below and at the transverse center of the frame is a second arbor, E, that receives motion from said first arbor, D, which motion is imparted to a third arbor, F, that is located above and at the left of said arbor E. A fourth arbor, G, located at the center of the frame, receives motion from the arbor F and imparts the same to an escape-wheel arbor, H, which is located above and to the left of the former. A pallet-arbor, I, and balance-wheel arbor, K, complete the arbors of the regular train, each of which is provided with the usual wheels, pinions, 850., and operates in the ordinary manner. The center arbor, G, projects beyond the front plate, A, through a sleeve, Z, which is attached to a bridge, L, thatis secured upon said plate. Upon said sleeve is placed a hollow pinion, M, and around the same is placed a wheel, N, which pinion and wheel are provided with hubs or and a, respectively, for the reception of a minutes-hand, O, and an hours-hand, P. Said wheel and pinion are driven by the projecting end of the second arbor, E, through ordinary dial-wheels, Q and R. The projecting end of the arbor E carries a minutes-hand, S,

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and uponthe center arbor, G,is placed a sweep v e eaaiioc ence with the time-t'ain, upon each of said arbors is loosely fitted a sleeve, to, which at its lower end is secured within a heart-shaped cam, U, and said parts connected with said arbors by spring-friction. The hands S and T are secured upon the ends of said sleeves a, and while moving with said arbors under ordinary circumstances may be turned freely thereon in either direction when desired. A bar, V, pivoted at one end, near the upper end of'the plate A, may, by means of a push-rod, W, that projects upward through the casing, be moved bodily toward said cams, while by the action of a spring, X, said bar is moved away from the latter when released. At the points of contact between said bar and cams the former is provided with t -shaped projections e, which, by impingement upon the pcripheries of the latter, cause the same to rotate until said projections drop into the notches a at the center of each cam, the arrangement being such as to cause said cams, with their hands, to be simultaneously turned to the position shown by dotted lines of Fig. 2 whenever said push-rod V is moved downward.

Journaled between the plate Aand a bridge, Y, above the center arbor, Gr, is an arbor, Z, which is provided between its bearings with a pinion, 2, that meshes with and receives motion from a toothed wheel h, which is secured rigidly upon the projecting end of the escapewheel arbor H. The projecting end of said arbor Z carries a hand, 2, while at its rear end said arbor is provided with a squared part, z upon which bears the free end of aflat spriug,z

When, now, the train is set in motion, the hand 2 is caused to move forward at each movement of the escape-wheel, and by properly proportioning the wheel h and pinion 2 said hand will be caused to rotate once each second and to indicate quarters or fifths of seconds upon its dial. The motion of the train is arrested, when desired, by means of a bar, A, which has the general form of the letter L, and is pivoted at the intersection ofits arms upon a suitable bearing, so as to permit the end of its longest arm a to be movedinto or out of contact with the balance-wheel 7r. Said stop-bar is operated by means of a rod, B, which has one end pivoted upon the short arm a of the former, and from thence extends laterally outward through the casing.

In order that the motion of thebalance-wheel may be instantly arrested, it is necessary that the stop-bar be caused to impinge suddenly upon the same, which result is obtained in the following manner, viz: Secured to and extending rearward from near the longitudinal center of the arm a is an arm, a which has its rear end bent at or near a right angle, so as to bring the same into the same plane with said main arm a. The end of said arm a is engaged, when moved up and down,with said stop-bar by a lug, G, which has its faces inclined, so as to cause said end to pass upon one side of said lug when moving in one direction. and upon the opposite side of the same when moving in the opposite direction, the re sult being the springing of said arm a toward or awayfrom said balance.

The stop-bar A is arranged so that when it is desired to arrest the motion of the balance It its arm a is moved toward the latter, but before coming into contact therewith is, by the operation of the arm a? and lug G, sprung outward until after the latter passes outof engagement, when said arm a is liberated and suddenly impinges upon and arrests the motion of said balance-wheel. At the moment of con tact between said stop-bar and balance-wheel the motion of the former upon its pivotal bearing ceases, and all parts are instantly brought into a state of rest.

When it is desired to start the time mechanism the stop-bar A is moved in the reverse direction from that described, when its engaging-arm a is held in contact with the balance by the operation of the inclined lug U, and moving said balance in the same direction gives to it the necessary turn to cause it to instantly vibrate after said arm a has passed out of contact.

The invention has been described as applied to clocks; but is equally applicable to watches. \Vhen used for watches the fourth arbor will preferably occupy a position at one side of the center of the train, and a special arbor for the sweep seconds-hand will be placed at such center and driven by the third wheel. The zerosetting attachment would in such event be placed upon said special arbor and operate in precisely the manner before described.

Having thus fully set forth the nature and merits of my invention, what I claim as new isl. A time mechanism provided with a leverescapement and adapted for use in the ordinary manner, and having a single train that actuates the usual hours and minutes hands, and also actuates a sweep seconds-hand and a quarter-seconds hand, which move simultaneously, substantially as and for the purpose specified.

2. A time mechanism in which a quarterseconds hand is attached to a separate arbor that receives motion directly from the escapewheel arbor, substantially as and for the purpose shown.

In combination with the arbor of the quarter-seconds hand, provided with a squared portion, a flat spring having its free end in engagement with and adapted to bear upon said squared part, substantially as and for the purpose set forth.

l-. A time mechanism provided with a leverescapernent and adapted for use in the ordinary mauner, and having a single train which actuates the usual hours and minutes hands, a centrally-arranged sweep secondshand, a quarter-seconds hand, and an independentlyadjustable minutes-hand, and provided with means whereby, by the operation of one mechanism, said sweep seconds-handandindepend ent minutes-hand may be simultaneously set at zero substantially as and for the purpose hand, and having: at one side ofsaid center an shown and described. independent minutes-hand and at the oppo- 5. A time mechanism having combined with site side of said center a quarter-seconds hand, its balance-Wheel a stop which, as it reaches substantially as and for the purpose shown. :5 5 the limit of its motion in a forward direction, In testimony that I claim the foregoing I impinges upon and instantly arrests the 1110- have hereunto set my hand this 9th day of Notion of said balance-Wheel, substantially as and vember, 1882.

for the purpose specified. JACOB KARE.

6. A time mechanism provided at the center Witnesses: 10 of its dial with the usual minutes and hours GEO. S. PRINDLE,

hands and with anindependent sweep seconds- HENRY O. HAZARD. 

